Swann SWO-ZTH01K-US One Zen Thermostat (White) ENERGY MANAGEMENT; Control your heating and cooling to optimize your energy use EASY SET UP; Screw less wiring terminals. Web based system setup and wiring guide. Uses 4 commonly available AA batteries and batteries are included. MOBILE ALERTS; Receive alerts and status updates on your Smartphone when paired with a SwannOne Smart Hub TEMPERATURE CONTROL MODES; Cool, heat, auto and emergency heat modes. For use with LOW VOLTAGE systems. Is your system labeled 120V-240V. Do you see thick wires with wire-nuts. If you DO then your system IS NOT compatible with the Zen Thermostat. Please check before ordering.